The correct order of electrical activity in the heart is Sin

The correct order of electrical activity in the heart is Sinoatrial Node, Atrioventricular Node, Bundle of HIS, Bundle Branches Atrioventricular Node, Sinoatrial Node, Bundle of HIS, Bundle Branches Atrioventricular Node Bundle Branches, Bundle of HIS, Atrioventricular Node, Sinoatrial Node

Solution

The correct of answer is option a

The cardiac impulse generated in the Sinoatrial node and travels through the atrioventricular node which also act as a reserve pacemaker fron there to bundle of His which is a conducting tissue to bundle branches,hence ootion a is correct answer.

Cardiac impulse is not primarily generated and travels through the atrioventricular node and bundle branches so option b,c and d is not correct.